Sound-insulating partition



- June 9, 1925.

\ A. H. DODGE sounn INSULATING PARTITION Filed April 19, 1924 INVENTORAri/ r H Dod e.

ATTORNEYS Patented June 9, 1925.

-UNITED- STATES 1,540,932 PATENT OFFICE.

ARTHUR H. nonen, on NEW YORK, N. Y., assrenon TO THE J. c. wrnsonconrona TION, or NEW YORK, N. Y., A conronarron or VIRGINIA.

SOUND-INSULATING ran'rrrron.

rApphcation filed April 19, 1924.. Serial No. 707,553.

To all whom it may concern:

' Be it known that I, ARTHUR H. DODGE, a citizen'of the United States,residing at New York, in thecounty of New York and State of New York,have invented a certain new and useful Improvement in Sound-InsulatingPartitions, of which the'following is a clear, full, and exactdescription. This invention relates to the insulation of doors or ofrelatively thin partitions against the passage of sound therethrough,and has .for its general object to provide such insulation in door orpartition constructions without radical change either in the designs ofthe doors or partitions, in the process of 1 manufacture .or in themethod of sectiring the parts together. j

Insulation of permanent partitions against the passage of soundtherethrough, particula-rly where the thickness or weight of thepartitions is not a major consideration, is comparatively easy. Theprincipal difliculty encountered is when'attempts are made to provideadequate sound-insulation in doors, thin, paneled partitions andpartitions made up of movable sections, such as folding doors, etc. Insuch partitions and doors, particularly where portability or ease of'movement is an essential characteristic, the

problem of providing eflective insulation without increasing either theweight or the thickness of the door or partition, orradically changingits design and appearance, or reducing its structural strength, presentsmore difliculty.

The present invention aims to provide simple but effective means. toinsulate such doors and partitions against passage of soundtherethrough, or at least to reduce their sound-transmitting properties.

An important feature of the invention is the provision of asound-insulating layer or lamina, which may be, readily secured inposition between adjacent laminae by the same means that serve to unitethe adjacent Other objects and Fig. 2 a' sectional view of the modifiedconstruetlon in which both the panel and the .stile or rail, or both, ofthe door are provided with the novel sound-insulating means ofthepresent invention.

ld 1g. 3 1s a pilaster, sucli as-used with foldmg doors of the typehereln shown, showing one mode of effecting, sound insulation of suchconstructions, and

v v Big. 4 is an elevatlon of a door having parts broken away toillustrate the nature of.

the sound-insulating means.

In the form of the invention shown in Fig.1, which is suitable for usewhere difiiculty is experienced only in the passage of sound through thepanel sections of doors, it will-be noted that only the panel section ofthe door is provided with the novel soundmsulating means .of the presentinvention. In the construction illustrated in this figure, the panel,which is shown 'in cross-section, comprises laminae of wood veneer uponthe two sides of an intermediate layer't' made up of wire mesh, thislayer serving as the sound-insulating or sound-retarding layer.

One advantage of using the wire mesh as sound-insulating orsound-retarding means in a construction of this sort is that it mayreadily be secured in position without material modification of the doorconstruction or' marked increase .in thickness or reduc tion in strengthof the parts. In securing this sound-insulating or retarding means inpositionbetween the adjacent laminae, the

screen cloth or wire mesh, which is preferably similar to that used forinsect or similar screens, is set in a heavy bed of glue between theadjacent laminae of the panels and the laminated structure thus producedis pressed together under considerable pressure, thereby forcing themesh into the wood so as to produce a substantially integral structure.

Thus, preferably both the adjacent laminw of wood are united by glueextending through the interstices of the, screen mesh, and the screenitself is also securely locked to theadjacent laminae by being forciblyunited thereto, and is held rigidly in position as a part of thepermanent structure. In addition to setting the screen mesh in a bed ofglue and securing it in position adjacent the laminae in a manner justdescribed, the mesh may be cut to project be.- yond the edges of theadjacent wood laminae and may be bent over these edges, as shown in Fig.2, and secured thereto in any suitable manner, as for example, by meansof light nails.

When the stiles or rails of a door are to be provided withsound-insulating means in accordance with the present invention, suchmeans may be set in glue as hereinbefore described, and a thin veneer 3of wood may then be nailed over it to hold it in position, and theoutside veneer 5 of the stile or rail may then be glued under pressureto the first-mentioned veneer in the usual mannenr When the soundretarding material is lo cated within the stile or rail, 'it ispreferably not crimped over the edges in the manvner above described inconnectionwith the panels but is preferably cut slightly smaller thanthe adjacent wood layers in order to provide a trimming edge to secureaccurate.

' are united.

fitting of the door or partition section.

In insulating either the stiles and'rails of doors or sections of lightpartitions, more than one sound-insulating layer may be provided asshown at 6'and 8 in Fig. 2, and at 10 and 12 in Fig. 3. A What I claimis; v

A 1. A Sound insulating door or partition comprising laminae, and anintermediate edges of'which are bent over the edges of one of theadjacent laminae.

3. A sound insulating door comprising a frame structure and panels,andhaving an 40 insulating layer extending through a the frame andthrough the panels, said layer comprising a metallic screen having itsinterstices filled with an adhesive by which it and the adjacent partsof vthe door are united.

4. A sound insulating door or other par tition section comprisinglaminae and an intermediate lamina interposed between said laminae andconsisting of a wire mesh.

5. A sound insulating door comprising a frame and panels, said frame andsaid panels each haying as an intermediate layer, between the facesthereof, a wire mesh,- and means acting upon adjacent portions of saidframe and said panels for securing said mesh in position as a permanentand immovable part of the door structure.

6. A sound-insulating' door member comprising outer layers of wood andan inner layer otwire mesh forcibly united tosaid layers to form asubstantially integral structure 7. A sound-insulating door membercomprising an inner layer of wire mesh, outer layers of wood pressedagainst said mesh,. and adhesive means to assist in binding said layersof wood to each other and to said mesh.

Signed at New York city, New York, this s 17th day of April, 1924.

ARTHUR DODGE.

